Luciola

One of the 3 demons made by Ashtaroth, granted with incredibly strong powers as compensation for their short lifespan. Luciola is the oldest of the three demon sisters, her origin is a firefly. Even though she is dedicated to fulfill Ashtaroth's will, she falls in love with Yokoshima and is willing to die for one night in bed with him. Her unique ability is to control the light to create illusions. ~!She sacrifices her life to save Yokoshima. They could have resurrected With Ashtaroth's machine, but Mikami destroyed to save her own skin. Now the only chance is to be reincarnated as Yokoshima's child.!~ (Source: Wikipedia)